Library of Congress Classification/Class T

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CLASS T - TECHNOLOGY

(Click each subclass for details)

Subclass T Technology (General)
Subclass TA Engineering (General). Civil engineering
Subclass TC Hydraulic engineering. Ocean engineering
Subclass TD Environmental technology. Sanitary engineering
Subclass TE Highway engineering. Roads and pavements
Subclass TF Railroad engineering and operation
Subclass TG Bridge engineering
Subclass TH Building construction
Subclass TJ Mechanical engineering and machinery
Subclass TK Electrical engineering. Electronics. Nuclear engineering
Subclass TL Motor vehicles. Aeronautics. Astronautics
Subclass TN Mining engineering. Metallurgy
Subclass TP Chemical technology
Subclass TR Photography
Subclass TS Manufacturers
Subclass TT Handicrafts. Arts and crafts
Subclass TX Home economics

Subclass T

T1-995 Technology (General)
T10.5-11.9   Communication of technical information
T11.95-12.5 Industrial directories
T55-55.3   Industrial safety. Industrial accident prevention
T55.4-60.8 Industrial engineering. Management engineering
T57-57.97 Applied mathematics. Quantitative methods
T57.6-57.97   Operations research. Systems analysis
T58.4 Managerial control systems
T58.5-58.64 Information technology
T58.6-58.62 Management information systems
T58.7-58.8 Production capacity. Manufacturing capacity
T59-59.2 Standardization
T59.5 Automation
T59.7-59.77 Human engineering in industry. Man-machine systems
T60-60.8 Work measurement. Methods engineering
T61-173 Technical education. Technical schools
T173.2-174.5 Technological change
T175-178 Industrial research. Research and development
T201-342 Patents. Trademarks
T351-385 Mechanical drawing. Engineering graphics
T391-995 Exhibitions. Trade shows. World's fairs
Subclass TA
TA1-2040 Engineering (General). Civil engineering (General)
TA164   Bioengineering
TA165 Engineering instruments, meters, etc. Industrial instrumentation
TA166-167 Human engineering
TA168 Systems engineering
TA170-171 Environmental engineering
TA174 Engineering design
TA177.4-185 Engineering economy
TA190-194 Management of engineering works
TA197-198 Engineering meteorology
TA213-215 Engineering machinery, tools, and implements
TA329-348 Engineering mathematics. Engineering analysis
TA349-359 Mechanics of engineering. Applied mechanics
TA365-367 Acoustics in engineering. Acoustical engineering
TA401-492 Materials of engineering and construction. Mechanics of materials
TA495 Disasters and engineering
TA501-625 Surveying
TA630-695 Structural engineering (General)
TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Underground construction
TA715-787 Earthwork. Foundations
TA800-820 Tunneling. Tunnels
TA1001-1280 Transportation engineering
TA1501-1820 Applied optics. Photonics
TA2001-2040 Plasma engineering. Applied plasma dynamics
Subclass TC
TC1-978 Hydraulic engineering
TC160-181   Technical hydraulics
TC183-201 General preliminary operations. Dredging. Submarine building
TC203-380 Harbors and coast protective works. Coastal engineering. Lighthouses
TC401-506 River, lake, and water-supply engineering (General)
TC530-537 River protective works. Regulation. Flood control
TC540-558 Dams. Barrages
TC601-791 Canals and inland navigation. Waterways
TC801-978 Irrigation engineering. Reclamation of wasteland. Drainage
TC1501-1800 Ocean engineering
Subclass TD
TD1-1066 Environmental technology. Sanitary engineering
TD159-168   Municipal engineering
TD169-171.8 Environmental protection
TD172-193.5 Environmental pollution
TD194-195 Environmental effects of industries and plants
TD201-500 Water supply for domestic and industrial purposes
TD419-428   Water pollution
TD429.5-480.7 Water purification. Water treatment and conditioning. Saline water conversion
TD481-493 Water distribution systems
TD511-780 Sewage collection and disposal systems. Sewerage
TD783-812.5 Municipal refuse. Solid wastes
TD813-870 Street cleaning. Litter and its removal
TD878-894 Special types of environment
 Including soil pollution, air pollution, noise pollution
TD895-899 Industrial and factory sanitation
TD896-899 Industrial and factory wastes
TD920-934 Rural and farm sanitary engineering
TD940-949 Low temperature sanitary engineering
TD1020-1066 Hazardous substances and their disposal
Subclass TE
TE1-450 Highway engineering. Roads and pavements
TE175-176.5   Highway design. Interchanges and intersections
TE177-178.8 Roadside development. Landscaping
TE200-205 Materials for roadmaking
TE206-209.5 Location engineering
TE210-228.3 Construction details
 Including foundations, maintenance, equipment
TE250-278.8 Pavements and paved roads
TE279 Streets
TE279.5-298 Pedestrian facilities
TE280-295   Sidewalks. Footpaths. Flagging
TE298 Curbs. Curbstones
Subclass TF
TF1-1620 Railroad engineering and operation
TF200-320   Railway construction
TF340-499 Railway equipment and supplies
TF501-668 Railway operation and management
TF670-851 Local and light railways
TF840-851   Elevated railways and subways
TF855-1127 Electric railways
TF1300-1620 High speed ground transporation
Subclass TG
TG1-470 Bridge engineering
Subclass TH
TH1-9745 Building construction
TH845-895   Architectural engineering. Structural engineering of buildings
TH900-915 Construction equipment in building
TH1000-1725 Systems of building construction
 Including fireproof construction, concrete construction
TH2025-3000 Details in building design and construction
 Including walls, roofs
TH3301-3411 Maintenance and repair
TH4021-4977 Buildings: Construction with reference to use
 Including public buildings, dwellings
TH5011-5701 Construction by phase of the work (Building trades)
TH6014-6081 Environmental engineering of buildings. Sanitary engineering of buildings
TH6101-6887 Plumbing and pipefitting
TH7005-7699 Heating and ventilation. Air conditioning
TH7700-7975 Illumination. Lighting
TH8001-8581 Decoration and decorative furnishings
TH9025-9745 Protection of buildings
 Including protection from dampness, fire, burglary
Subclass TJ
TJ1-1570 Mechanical engineering and machinery
TJ163.13-163.25   Power resources
TJ163.26-163.5 Energy conservation
TJ170-179 Mechanics applied to machinery. Dynamics
TJ181-210 Mechanical movements
TJ210.2-211.47 Mechanical devices and figures. Automata. Ingenious mechanisms. Robots (General)
TJ212-225 Control engineering systems. Automatic machinery (General)
TJ227-240 Machine design and drawing
TJ241-254.7 Machine construction (General)
TJ255-265 Heat engines
TJ266-267.5 Turbines. Turbomachines (General)
TJ268-740 Steam engineering
TJ603-695   Locomotives
TJ751-805 Miscellaneous motors and engines
 Including gas, gasoline, diesel engines
TJ807-830 Renewable energy sources
TJ836-927 Hydraulic machinery
TJ940-940.5 Vacuum technology
TJ950-1030 Pneumatic machinery
TJ1040-1119 Machinery exclusive of prime movers
TJ1125-1345 Machine shops and machine shop practice
TJ1350-1418 Hoisting and conveying machinery
TJ1425-1475 Lifting and pressing machinery
TJ1480-1496 Agricultural machinery. Farm machinery
TJ1501-1519 Sewing machines
Subclass TK
TK1-9971 Electrical engineering. Electronics. Nuclear engineering
TK301-399   Electric meters
TK452-454.4 Electric apparatus and materials. Electric circuits. Electric networks
TK1001-1841 Production of electric energy or power. Powerplants. Central stations
TK2000-2891 Dynamoelectric machinery and auxiliaries
 Including generators, motors, transformers
TK2896-2985 Production of electricity by direct energy conversion
TK3001-3521 Distribution or transmission of electric power
TK4001-4102 Applications of electric power
TK4125-4399 Electric lighting
TK4601-4661 Electric heating
TK5101-6720 Telecommunication
 Including telegraphy, telephone, radio, radar, television
TK7800-8360 Electronics
TK7885-7895   Computer engineering. Computer hardware
TK8300-8360 Photoelectronic devices (General)
TK9001-9401 Nuclear engineering. Atomic power
TK9900-9971 Electricity for amateurs. Amateur constructors' manuals
Subclass TL
TL1-4050 Motor vehicles. Aeronautics. Astronautics
TL1-484   Motor vehicles. Cycles
TL500-777 Aeronautics. Aeronautical engineering
TL780-785.8 Rocket propulsion. Rockets
TL787-4050 Astronautics. Space travel
Subclass TN
TN1-997 Mining engineering. Metallurgy
TN263-271   Mineral deposits. Metallic ore deposits. Prospecting
TN275-325 Practical mining operations. Safety measures
TN331-347 Mine transportation, haulage and hoisting. Mining machinery
TN400-580 Ore deposits and mining of particular metals
TN600-799 Metallurgy
TN799.5-948 Nonmetallic minerals
TN950-997 Building and ornamental stones
Subclass TP
TP1-1185 Chemical technology
TP155-156   Chemical engineering
TP200-248 Chemicals: Manufacture, use, etc.
TP248.13-248.65 Biotechnology
TP250-261 Industrial electrochemistry
TP267.5-301 Explosives and pyrotechnics
TP315-360 Fuel
TP368-456 Food processing and manufacture
TP480-498 Low temperature engineering. Cryogenic engineering. Refrigeration
TP500-660 Fermentation industries. Beverages. Alcohol
TP670-699 Oils, fats, and waxes
TP690-692.5   Petroleum refining. Petroleum products
TP700-746 Illuminating industries (Nonelectric)
TP751-762 Gas industry
TP785-869 Clay industries. Ceramics. Glass
TP875-888 Cement industries
TP890-933 Textile bleaching, dyeing, printing, etc.
TP934-945 Paints, pigments, varnishes, etc.
TP1080-1185 Polymers and polymer manufacture
Subclass TR
TR1-1050 Photography
TR250-265   Cameras
TR287-500 Photographic processing. Darkroom technique
TR504-508 Transparencies. Diapositives
TR510-545 Color photography
TR550-581 Studio and laboratory
TR590-620 Lighting
TR624-835 Applied photography
 Including artistic, commercial, medical photography, photocopying processes
TR845-899 Cinematography. Motion pictures
TR925-1050 Photomechanical processes
Subclass TS
TS1-2301 Manufactures
TS155-194   Production management. Operations management
TS195-198.8 Packaging
TS200-770 Metal manufactures. Metalworking
TS780-788 Stonework
TS800-937 Wood technology. Lumber
TS840-915   Wood products. Furniture
TS920-937 Chemical processing of wood
TS940-1047 Leather industries. Tanning
TS1060-1070 Furs
TS1080-1268 Paper manufacture and trade
TS1300-1865 Textile industries
TS1870-1935 Rubber industry
TS1950-1982 Animal products
TS2120-2159 Cereals and grain. Milling industry
TS2220-2283 Tobacco industry
TS2284-2288 Animal feeds and feed mills. Pet food industry
Subclass TT
TT1-999 Handicrafts. Arts and crafts
TT161-170.7   Manual training. School shops
TT174-176 Articles for children
TT180-200 Woodworking. Furniture making. Upholstering
TT201-203 Lathework. Turning
TT205-267 Metalworking
TT300-382.8 Painting. Wood finishing
TT387-410 Soft home furnishings
TT490-695 Clothing manufacture. Dressmaking. Tailoring
TT697-927 Home arts. Homecrafts
 Including sewing, embroidery, decorative crafts
TT950-979 Hairdressing. Beauty culture. Barbers' work
TT980-999 Laundry work
Subclass TX
TX1-1110 Home economics
TX301-339   The house
 Including arrangement, care, servants
TX341-641 Nutrition. Foods and food supply
TX642-840 Cooking
TX851-885 Dining-room service
TX901-946.5 Hospitality industry. Hotels, clubs, restaurants, etc. Food service
TX950-953 Taverns, barrooms, saloons
TX955-985 Building operation and housekeeping
TX1100-1105 Mobile home living
TX1110 Recreational vehicle living